JPH0666173U - Wiper unit mechanism - Google Patents

Abstract

(57) [Summary] [Purpose] The wiper attached to the surveillance camera case
Change from horizontal swing motion to vertical swing motion so that the field of view of the lens is not impaired when stopped. [Structure] A rotary plate 5 axially attached to a rotary shaft 4 of a motor 3,
A link transmission pin 6 arranged on the side circumference of the rotary plate 4, a link arm A7 having one end axially attached to one end of the link transmission pin 6, and a link support pin axially attached to the other end of the link arm A7. 8, a link arm B9 having one end axially attached to the link support pin 8, a drive shaft 10 fixed to the other end of the link arm B9, and one gear 13 fixed to the drive shaft 10.
And the other gear 13 meshes with the gear 13,
One end of a bendable wiper arm 17 formed of two bendable members is fixed to the driven shaft 15 fixed to the drive shaft 3 and the drive shaft 10, and the support pin 19 is inserted into the hole at the other end of the wiper arm 17. Then, the wiper blade 18 is attached.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wiper unit mechanism attached to a camera case for a surveillance camera used outdoors.

[0002]

[Prior art]

 Generally, a surveillance camera is housed in a camera case equipped with a wiper unit in order to protect the camera from rainwater and dust. The mechanism of this wiper unit is shown in front of the camera case 31 as shown in FIG. By mounting the wiper unit 32 on the upper part and energizing the motor 33, the rotating plate 34 pivotally mounted on the rotating shaft of the motor 33 rotates and the transmission pin 35 fixed to the peripheral side of the rotating plate. By rotating the roller in an arc shape, the wiper rotary shaft 38 fixed to one end of the link arm B37 reciprocates at a constant rotation angle via the link arm A36 rotatably supported by the transmission pin 35. Then, the wiper arm 39 attached to the wiper rotary shaft 38 is swung in a fan shape, and the wiper blade 41 attached to the wiper arm 39 is attached to the transparent window 42. And to keep the field of view to remove raindrops on the surface. According to such a conventional technique, when the wiper is stopped, a portion inclined from the wiper rotation shaft 38, which is one end of the wiper arm 39 and the wiper correction arm 40, to the side of the transparent window 42 at the other end, Since there is a position that closes one corner of the transparent window 42, when the lens 43 of the camera housed in the camera case 31 uses a wide angle, the visual field range 44 imaged by the lens 43 also has a wide angle, so the wiper The arm 39 and the wiper correction arm 40 enter the visual field range 44, and a symptom appears in a part of the imaging screen.

[0003]

[Problems to be solved by the device]

 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a wiper unit mechanism that does not obstruct the field of view even if a wide-angle lens is used.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention solves the above-mentioned problems by providing a rotary plate pivotally mounted on a rotary shaft of a motor, a drive shaft and a driven shaft rotatably arranged side by side in a unit case, and a circular motion of the rotary plate to drive A link arm that links the rotary plate and a drive shaft to convert the shaft into a reciprocating motion; a gear fixed to each shaft to transmit the reciprocating motion of the drive shaft to a driven shaft; a wiper blade; A wiper unit mechanism including a pair of wiper arms that links the drive shaft and the driven shaft with the wiper blade to convert the reciprocating motion of the shaft and the driven shaft into the vertical movement of the wiper blade.

[0005]

[Action]

 With the above structure, according to the wiper unit mechanism of the present invention, when the motor is energized to rotate the rotary plate, the link transmission pin fixed to one side of the rotary plate rotates in an arc shape. Then, the drive shaft, which is fixed to one end of the link arm B through the link arm A axially attached to the transmission pin, reciprocates at a constant rotation angle, so that one gear fixed to the drive shaft is also the same. And is transmitted to the other gear that meshes with this gear, and the driven shaft fixed to this gear reciprocates in the direction opposite to that of the drive shaft. The two wiper arms, one end of which is fixed to the drive shaft and the driven shaft, are bent in a pantograph shape, and a wiper blade inserted into the other end of the wiper arm is attached to the other end of the see-through window in the vertical direction. When the wiper operation is stopped, the wiper blade stops at the position of the upper end of the see-through window, and the wiper arm is placed outside the field of view of the lens. There is no blind spot.

[0006]

【Example】

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 is a front view showing a wiper unit mechanism of a camera case applied to the present invention, FIG. 2 is a front side view of a main part including a partial cross section of FIG. 1, (A) is a front view, and (B) is It is the side view. In the figure, reference numeral 1 denotes a camera case. A wiper unit 2 is attached to the front upper part of the camera case 1, and although not shown, a rotating plate is attached to a rotating shaft 4 of a motor 3 containing a speed reducing mechanism fixed to a motor mount. 5, one end of a link transmission pin 6 arranged on the side circumference of the rotary plate 5 is pivotally supported to one end of a link arm A7, and a link support pin 8 is pivotally supported to the other end of the link arm A7. One end of the link arm B9 is pivotally supported via. Reference numeral 10 denotes a drive shaft having a shaft structure. A substantially central portion of the drive shaft 10 is pivotally supported by one bearing 12 having a waterproof structure by being fixed to one hole of the unit case 11, One gear 13 having teeth is fixed to one end of the drive shaft 10, and the other end of the link arm B9 is fixed. The other gear 13 formed in the same shape as the gear 13 is fixed to one end of a driven shaft 15 formed in substantially the same shape as the drive shaft 10, and the driven shaft 15 of the unit case 11 is formed. It is rotatably supported by the other bearing 12 arranged in the other hole so as to mesh with the one gear 12.

Reference numeral 17 denotes a wiper arm having two bent portions that are bent in a pantograph shape, and one end of the wiper arm 17 is inserted into the other ends of the drive shaft 10 and the driven shaft 15. A hole that engages with a support pin 19 erected on the wiper blade 18 is provided at the other end of the wiper blade 18 which is fixed by a screw or the like, and a predetermined portion is provided at the center of the wiper blade 18 in this hole. Two support pins 19 are inserted at intervals and supported, and one end of a leaf spring 21 is inserted or fixed to the back surface of the wiper arm 17 with a screw or the like, and the other end of the leaf spring 21 is The wiper blade 18 is brought into contact with the lateral side of the wiper blade 18 and urged to bring the wiper blade 18 into close contact with the surface of the see-through window 20.

Next, the operation of the wiper unit mechanism will be described. By energizing the motor 3 to rotate the rotary plate 5, the link transmission pin 6 fixed to the side periphery of the rotary plate 5 rotates in an arc shape and is transmitted to the link arm A7. The drive shaft 10, which is interlocked with the frame B9 and fixed to one end of the link arm B9, reciprocates at a constant rotation angle. Therefore, one gear 13 fixed to the drive shaft 10 also reciprocates in the same manner, and the other gear 13 meshed with the gear 13 also reciprocates in the opposite rotation direction in conjunction with the one gear 13. Then, the driven shaft 15 fixedly attached to the gear 13 and reciprocated in the same manner causes the driven shaft 15 and one end of the two wiper arms 17 attached to the drive shaft 10 to move together. The wiper blade 18, which swings in a relative direction around the fulcrum at a constant rotation angle and is bent in a pantograph shape, and which is attached by inserting the support pin 19 into the hole at the other end of the wiper arm 17, is the surface of the see-through window. Is moved up and down to remove the attached raindrops, and when the wiper operation is stopped, the upper end of the see-through window is set to the stop position of the wiper blade 18 so that Wiper arm 17 also never caught on imaging screen because of the location.

[0009]

[Effect of device]

 As described above, the wiper unit mechanism according to the present invention has the effect of expanding the field of view of the camera housed in the camera case.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of a wiper unit mechanism according to the present invention.

FIG. 2 is a front side view of a main part including a partial cross section showing an embodiment of a wiper unit mechanism according to the present invention, (A) is a front view, and (B) is a side view thereof.

FIG. 3 is a front view showing an example of a conventional wiper unit mechanism.

[Explanation of symbols]

 1 Camera Case 2 Wiper Unit 3 Motor 4 Rotating Shaft 5 Rotating Plate 6 Link Transmission Pin 7 Link Arm A 8 Link Support Pin 9 Link Arm B 10 Drive Shaft 11 Unit Case 12 Bearing 13 Gear 15 Driven Shaft 17 Wiper Arm 18 Wiper Blade 19 Support pin 20 Transparent window 21 Leaf spring 22 Wide-angle lens 23 Field of view

Claims (1)

[Scope of utility model registration request] 1. A rotary plate rotatably mounted on a rotary shaft of a motor, a drive shaft and a driven shaft rotatably arranged side by side in a unit case, and a circular motion of the rotary plate is converted into a reciprocating motion of the drive shaft. Therefore, a link arm that links the rotary plate and the drive shaft, a gear fixed to each shaft to transmit the reciprocating motion of the drive shaft to the driven shaft, a wiper blade, and the reciprocating motion of the drive shaft and the driven shaft. A wiper unit mechanism comprising a pair of wiper arms that link the drive shaft and the driven shaft with the wiper blade to convert the wiper blade into vertical movement.